339 Crocodile Grain Calf Skin Watch Strap a trendy look for any watch. This Alpine, padded, crocodile grain on calf skin watch band is available in variety of sizes and in black, brown, blue and red. Select the size and colour that best suits your watch. Lug/Buckle Measurements: 12mm/10mm, 14mm/12mm, 16mm/14mm, 18mm/16mm, 20mm/18mm.